diff --git a/app/Mage.php b/app/Mage.php
index 209e2cfc42a..3bdbc88e7a4 100644
--- a/app/Mage.php
+++ b/app/Mage.php
@@ -8,6 +8,7 @@
  */
 
 use Carbon\Carbon;
+use Carbon\Exceptions\InvalidFormatException;
 use Monolog\Formatter\LineFormatter;
 use Monolog\Handler\StreamHandler;
 use Monolog\Level;
@@ -862,8 +863,17 @@ public static function isInstalled($options = [])
             if (is_readable($localConfigFile)) {
                 $localConfig = simplexml_load_file($localConfigFile);
                 date_default_timezone_set('UTC');
-                if (($date = $localConfig->global->install->date) && Carbon::parse((string) $date)->getTimestamp()) {
+
+                $date = (string) $localConfig->global->install->date;
+                if ($date === '') {
+                    return self::$_isInstalled;
+                }
+
+                try {
+                    Carbon::parse($date);
                     self::$_isInstalled = true;
+                } catch (InvalidFormatException) {
+                    self::$_isInstalled = false;
                 }
             }
         }